Title says it all. It’d be nice if Peplink supported the successor to NAT-PMP. This seems useful on both the LAN and the WAN side for dealing with CGNAT. From the RFC:
NAT-PMP was designed for residential NAT gateways, where such an
operation makes sense because a typical residential NAT gateway has
only one external IP address. PCP has broader scope, and also
supports Carrier-Grade NATs (CGNs) that may have a pool of external
IP addresses, not just one. A client may not be assigned any
particular external IP address from that pool until it has at least
one implicit, explicit, or static port mapping, and even then only
for as long as that mapping remains valid. Client software that just
wishes to display the user’s external IP address for cosmetic
purposes can achieve that by requesting a short-lived mapping (e.g.,
to the Discard service (TCP/9 or UDP/9) or some other port) and then
displaying the resulting external IP address. However, once that
mapping expires a subsequent implicit or explicit dynamic mapping
might be mapped to a different external IP address.